$OpenBSD: patch-docs_cmdline-opts_Makefile_in,v 1.1 2017/04/24 20:33:58 naddy Exp $

https://github.com/curl/curl/commit/3e5cef09d72cf5007b253aacf3a28b5b28fdb5bc

--- docs/cmdline-opts/Makefile.in.orig	Tue Apr 18 13:42:46 2017
+++ docs/cmdline-opts/Makefile.in	Mon Apr 24 20:20:12 2017
@@ -353,7 +353,7 @@ top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign no-dependencies
-MANPAGE = $(top_builddir)/docs/curl.1
+MANPAGE = $(abs_top_builddir)/docs/curl.1
 DPAGES = abstract-unix-socket.d anyauth.d append.d basic.d cacert.d capath.d cert.d \
   cert-status.d cert-type.d ciphers.d compressed.d config.d             \
   connect-timeout.d connect-to.d continue-at.d cookie.d cookie-jar.d    \
